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      <td><p class="toc level1"><a href="docinfo.html">Document Information</a></p>
<p class="toc level1 tocsp"><a href="gexaf.html">Preface</a></p>
<p class="toc level1 tocsp"><a href="gfirp.html">Part&nbsp;I&nbsp;Introduction</a></p>
<p class="toc level2"><a href="bnaaw.html">1.&nbsp;&nbsp;Overview</a></p>
<p class="toc level2"><a href="gfiud.html">2.&nbsp;&nbsp;Using the Tutorial Examples</a></p>
<p class="toc level1 tocsp"><a href="bnadp.html">Part&nbsp;II&nbsp;The Web Tier</a></p>
<p class="toc level2"><a href="bnadr.html">3.&nbsp;&nbsp;Getting Started with Web Applications</a></p>
<p class="toc level2"><a href="bnafd.html">4.&nbsp;&nbsp;Java Servlet Technology</a></p>
<p class="toc level2"><a href="bnagx.html">5.&nbsp;&nbsp;JavaServer Pages Technology</a></p>
<p class="toc level2"><a href="bnajo.html">6.&nbsp;&nbsp;JavaServer Pages Documents</a></p>
<p class="toc level2"><a href="bnakc.html">7.&nbsp;&nbsp;JavaServer Pages Standard Tag Library</a></p>
<p class="toc level2"><a href="bnalj.html">8.&nbsp;&nbsp;Custom Tags in JSP Pages</a></p>
<p class="toc level2"><a href="bnaon.html">9.&nbsp;&nbsp;Scripting in JSP Pages</a></p>
<p class="toc level2"><a href="bnaph.html">10.&nbsp;&nbsp;JavaServer Faces Technology</a></p>
<p class="toc level2"><a href="bnaqz.html">11.&nbsp;&nbsp;Using JavaServer Faces Technology in JSP Pages</a></p>
<p class="toc level2"><a href="bnatx.html">12.&nbsp;&nbsp;Developing with JavaServer Faces Technology</a></p>
<p class="toc level2"><a href="bnavg.html">13.&nbsp;&nbsp;Creating Custom UI Components</a></p>
<p class="toc level2"><a href="bnawo.html">14.&nbsp;&nbsp;Configuring JavaServer Faces Applications</a></p>
<p class="toc level2"><a href="bnaxu.html">15.&nbsp;&nbsp;Internationalizing and Localizing Web Applications</a></p>
<p class="toc level1 tocsp"><a href="bnayk.html">Part&nbsp;III&nbsp;Web Services</a></p>
<p class="toc level2"><a href="bnayl.html">16.&nbsp;&nbsp;Building Web Services with JAX-WS</a></p>
<p class="toc level2"><a href="bnazf.html">17.&nbsp;&nbsp;Binding between XML Schema and Java Classes</a></p>
<p class="toc level2"><a href="bnbdv.html">18.&nbsp;&nbsp;Streaming API for XML</a></p>
<p class="toc level2"><a href="bnbhf.html">19.&nbsp;&nbsp;SOAP with Attachments API for Java</a></p>
<p class="toc level1 tocsp"><a href="bnblr.html">Part&nbsp;IV&nbsp;Enterprise Beans</a></p>
<p class="toc level2"><a href="bnbls.html">20.&nbsp;&nbsp;Enterprise Beans</a></p>
<p class="toc level3"><a href="bnblt.html">What Is an Enterprise Bean?</a></p>
<p class="toc level4"><a href="bnblt.html#bnblu">Benefits of Enterprise Beans</a></p>
<p class="toc level4"><a href="bnblt.html#bnblv">When to Use Enterprise Beans</a></p>
<p class="toc level4"><a href="bnblt.html#bnblw">Types of Enterprise Beans</a></p>
<p class="toc level3 tocsp"><a href="bnbly.html">What Is a Session Bean?</a></p>
<p class="toc level4"><a href="bnbly.html#bnblz">State Management Modes</a></p>
<p class="toc level5"><a href="bnbly.html#bnbma">Stateful Session Beans</a></p>
<p class="toc level5"><a href="bnbly.html#bnbmb">Stateless Session Beans</a></p>
<p class="toc level4 tocsp"><a href="bnbly.html#bnbmc">When to Use Session Beans</a></p>
<p class="toc level3 tocsp"><a href="bnbmd.html">What Is a Message-Driven Bean?</a></p>
<p class="toc level4"><a href="bnbmd.html#bnbme">What Makes Message-Driven Beans Different from Session Beans?</a></p>
<p class="toc level4"><a href="bnbmd.html#bnbmf">When to Use Message-Driven Beans</a></p>
<p class="toc level3 tocsp"><a href="bnbmg.html">Defining Client Access with Interfaces</a></p>
<p class="toc level4"><a href="bnbmg.html#bnbmh">Remote Clients</a></p>
<p class="toc level4"><a href="bnbmg.html#bnbmj">Local Clients</a></p>
<p class="toc level4"><a href="bnbmg.html#bnbmk">Deciding on Remote or Local Access</a></p>
<p class="toc level4"><a href="bnbmg.html#bnbml">Web Service Clients</a></p>
<p class="toc level4"><a href="bnbmg.html#bnbmm">Method Parameters and Access</a></p>
<p class="toc level5"><a href="bnbmg.html#bnbmn">Isolation</a></p>
<p class="toc level5"><a href="bnbmg.html#bnbmo">Granularity of Accessed Data</a></p>
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<p class="toc level3 tocsp"><a href="">The Contents of an Enterprise Bean</a></p>
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<p class="toc level3"><a href="bnbmr.html">Naming Conventions for Enterprise Beans</a></p>
<p class="toc level3"><a href="bnbmt.html">The Life Cycles of Enterprise Beans</a></p>
<p class="toc level4"><a href="bnbmt.html#bnbmu">The Life Cycle of a Stateful Session Bean</a></p>
<p class="toc level4"><a href="bnbmt.html#bnbmw">The Life Cycle of a Stateless Session Bean</a></p>
<p class="toc level4"><a href="bnbmt.html#bnbmy">The Life Cycle of a Message-Driven Bean</a></p>
<p class="toc level3 tocsp"><a href="bnbna.html">Further Information about Enterprise Beans</a></p>
<p class="toc level2 tocsp"><a href="bnbnb.html">21.&nbsp;&nbsp;Getting Started with Enterprise Beans</a></p>
<p class="toc level2"><a href="bnboc.html">22.&nbsp;&nbsp;Session Bean Examples</a></p>
<p class="toc level2"><a href="bnbpk.html">23.&nbsp;&nbsp;A Message-Driven Bean Example</a></p>
<p class="toc level1 tocsp"><a href="bnbpy.html">Part&nbsp;V&nbsp;Persistence</a></p>
<p class="toc level2"><a href="bnbpz.html">24.&nbsp;&nbsp;Introduction to the Java Persistence API</a></p>
<p class="toc level2"><a href="bnbrl.html">25.&nbsp;&nbsp;Persistence in the Web Tier</a></p>
<p class="toc level2"><a href="bnbrs.html">26.&nbsp;&nbsp;Persistence in the EJB Tier</a></p>
<p class="toc level2"><a href="bnbtg.html">27.&nbsp;&nbsp;The Java Persistence Query Language</a></p>
<p class="toc level1 tocsp"><a href="bnbwi.html">Part&nbsp;VI&nbsp;Services</a></p>
<p class="toc level2"><a href="bnbwj.html">28.&nbsp;&nbsp;Introduction to Security in the Java EE Platform</a></p>
<p class="toc level2"><a href="bnbyk.html">29.&nbsp;&nbsp;Securing Java EE Applications</a></p>
<p class="toc level2"><a href="bncas.html">30.&nbsp;&nbsp;Securing Web Applications</a></p>
<p class="toc level2"><a href="bncdq.html">31.&nbsp;&nbsp;The Java Message Service API</a></p>
<p class="toc level2"><a href="bncgv.html">32.&nbsp;&nbsp;Java EE Examples Using the JMS API</a></p>
<p class="toc level2"><a href="bncih.html">33.&nbsp;&nbsp;Transactions</a></p>
<p class="toc level2"><a href="bncjh.html">34.&nbsp;&nbsp;Resource Connections</a></p>
<p class="toc level2"><a href="bncjx.html">35.&nbsp;&nbsp;Connector Architecture</a></p>
<p class="toc level1 tocsp"><a href="bnckn.html">Part&nbsp;VII&nbsp;Case Studies</a></p>
<p class="toc level2"><a href="bncko.html">36.&nbsp;&nbsp;The Coffee Break Application</a></p>
<p class="toc level2"><a href="bnclz.html">37.&nbsp;&nbsp;The Duke's Bank Application</a></p>
<p class="toc level1 tocsp"><a href="gexbq.html">Part&nbsp;VIII&nbsp;Appendixes</a></p>
<p class="toc level2"><a href="bncno.html">A.&nbsp;&nbsp;Java Encoding Schemes</a></p>
<p class="toc level2"><a href="bncnq.html">B.&nbsp;&nbsp;Preparation for Java EE Certification Exams</a></p>
<p class="toc level2"><a href="bncnt.html">C.&nbsp;&nbsp;About the Authors</a></p>
<p class="toc level1 tocsp"><a href="idx-1.html">Index</a></p>
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<a name="bnbmp"></a><h3>The Contents of an Enterprise Bean</h3>
<a name="indexterm-2047"></a><p>To develop an enterprise bean, you must provide the following files:</p>
<ul><li><p><a name="indexterm-2048"></a><b>Enterprise bean class</b>: Implements the methods defined in the business interface and any life cycle callback methods.</p></li>
<li><p><a name="indexterm-2049"></a><b>Business Interfaces</b>: The business interface defines the methods implemented by the enterprise bean class.</p></li>
<li><p><a name="indexterm-2050"></a><a name="indexterm-2051"></a><b>Helper classes</b>: Other classes needed by the enterprise bean class, such as exception and utility classes.</p></li></ul>
<p><a name="indexterm-2052"></a><a name="indexterm-2053"></a><a name="indexterm-2054"></a><a name="indexterm-2055"></a>You package the files in the preceding list into an EJB JAR file,
the module that stores the enterprise bean. An EJB JAR file is portable
and can be used for different applications. To assemble a Java EE application,
you package one or more modules (such as EJB JAR files) into an
EAR file, the archive file that holds the application. When you deploy the
EAR file that contains the bean&rsquo;s EJB JAR file, you also deploy the
enterprise bean to the Application Server. You can also deploy an EJB JAR
that is not contained in an EAR file. <a href="#bnbmq">Figure&nbsp;20-2</a> shows the contents
of an EJB JAR file.</p><a name="bnbmq"></a><h6>Figure&nbsp;20-2 Structure of an Enterprise Bean JAR</h6><img src="figures/ejbcon-module.gif" alt="Diagram showing the structure and contents of an enterprise bean JAR file."></img>
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